Automatic Bilge Pump
12V or 24V, with straight hose adaptor. 
When water level reaches the sea-point, the switch will be activated automatically and start to drain water; When water level is lower than the sea-point, it will stop draining water immediately. It can be also switched to manual using

For Hose 19mm(3/4")
18050-12CE: 12V, 500GPH 
18050-24CE: 24V, 500GPH  
18051-12CE: 12V, 700GPH  
18051-24CE: 24V, 700GPH 
#36/CTN

For Hose 29mm(1-1/8")
18052-12CE: 12V, 1500GPH 
18052-24CE: 24V, 1500GPH 
18053-12CE: 12V, 1800GPH 
18053-24CE: 24V, 1800GPH 
18054-12CE: 12V, 2000GPH 
18054-24CE: 24V, 2000GPH 
#12/CTN